Effect of Flushing on the Growth, Body Condition Score and Reproductive Efficiency of Corriedale Ewes during Breeding Season and Gestation Period

محورهای موضوعی : Camel

ام. آمبرین ¹ (Department of LivestockProductionManagement, Faculty of Veterinary Science and Animal Husbandry, SKUAST-K Shuhama, Auluteng, Srinagar, Jammu and Kashmir, India)
آ.اس. بهات ² (Department of LivestockProductionManagement, Faculty of Veterinary Science and Animal Husbandry, SKUAST-K Shuhama, Auluteng, Srinagar, Jammu and Kashmir, India)
اچ.ام. خان ³ (Department of LivestockProductionManagement, Faculty of Veterinary Science and Animal Husbandry, SKUAST-K Shuhama, Auluteng, Srinagar, Jammu and Kashmir, India)
ام.تی. بندای ⁴ (Department of LivestockProductionManagement, Faculty of Veterinary Science and Animal Husbandry, SKUAST-K Shuhama, Auluteng, Srinagar, Jammu and Kashmir, India)
آ. رشید ⁵ (Departmentof Animal Husbandry, Government of Jammu and Kashmir, India)
اچ. غزالی ⁶ (Department of LivestockProducts Technology, Faculty of Veterinary Science and Animal Husbandry, SKUAST-K Shuhama, Auluteng, Srinagar, Jammu and Kashmir, India)
اچ. اشرف ⁷ (Department of Animal Nutrition, Faculty of Veterinary Science and Animal Husbandry, SKUAST-K Shuhama, Auluteng, Srinagar, Jammu and Kashmir, India)

تاریخ دریافت : 1391/11/21 تاریخ پذیرش : 1391/12/26 تاریخ انتشار : 1393/03/11

کلید واژه: growth, Corriedale ewes, flushing, reproductive efficiency,

چکیده مقاله :

The present study was aimed to improve the reproductive performance of Corriedale ewes by nutritional flushing. Forty Corriedale ewes were divided into four treatment groups (TC, T1, T2 and T3) with 10 ewes in each group (n=10). At the beginning of the breeding season extra feeding (flushing regime) was started for approximately 34 days such that two estrus cycles were covered. First group i.e. TC (control) received no concentrate supplement, only grazing for 6-8 h was practiced. The treatment groups were fed concentrate supplement of 300 g/ewe/d (T1), 400 g/ewe/d (T2) and 500 g/ewe/d (T3) for 34 days in addition to grazing for 6-8 h. Changes in body weight were significantly (P≤0.05) higher in the ewes fed 500 g concentrate than TC and T1 while no significant difference was found between the other groups in respect of the body weight gain of the ewes. T2 and T3 groups revealed significantly (P≤0.05) higher body condition score than that of control and between T2 and T3 groups than that of T1 group, however no significant difference between Control and T1 groups as well as between T2 and T3 groups were observed, respectively. The tupping percentage recorded in the ewes of all the four groups was 100% and the lambing percentage observed was found to be 70%, 80%, 90% and 100% in TC, T1, T2 and T3 groups, respectively. An increase (P≤0.05) was observed in the birth weight of lambs with highest average weight observed in T3 group followed by T2 group, T1 group ewes and control.The study revealed that the body weight of ewes, dam performance during their gestation period, lambing rate and birth weight of lambs of Corriedale ewes showed considerable improvement due to nutritional flushing. The study also indicated that among all four treatment groups, T3 showed significant improvement in body weight and reproductive efficiency as a result of flushing supplementation during mating season. Hence it was concluded that feeding 500 g of concentrate in addition to sufficient grazing is ideal feeding regimen as compared to other treatment groups in order to achieve a higher body condition score and reproductive performance.

چکیده انگلیسی:

مطالعه حاضر برای بهبود عملکرد تولید‌مثلی میش‌های کوریدال با فلاشینگ تغذیه‌ای انجام شد. 40 رأس میش کوریدال به چهار گروه تیماری (1T، 2T، 3T و TC) با 10 میش در هر گروه تقسیم شدند. تغذیه اضافی میش‌ها در شروع فصل جفت‌گیری برای تقریباً 34 روز به طوری که دو دوره فحلی را پوشش دهد، انجام شد. میش‌های گروه اول (گروه شاهد، TC) هیچ مکمل کنسانتره‌ای دریافت نمی‌کردند و تنها روزانه 6 الی 8 ساعت چرا می‌کردند. میش‌های گروه‌های تیماری، علاوه بر چرا کردن، روزانه از مکمل کنسانتره‌ای به میزان 300 (1T)، 400 (2T) و 500 (3T) گرم تغذیه می‌شدند. تغییرات وزنی بدن به طور معنی‌داری (05/0P≤) در میش‌های تغذیه شده با 500 گرم کنسانتره در مقایسه با گروه‌های  TCو 1 Tبالاتر بود، در حالی‌که تفاوت معنی‌داری بین سایر گروه‌ها در رابطه با افزایش وزن بدن مشاهده نشد. گروه‌های 2 Tو 3 Tبه طور معنی‌داری (05/0P≤) نمره وضعیت بدنی بالاتری را در مقایسه با گروه کنترل و 1 Tنشان دادند. به هرحال هیچ گونه تفاوت معنی‌داری بین گروه‌های کنترل و 1 Tو همچنین 2 Tو 3 Tمشاهده نشد. درصد جفت‌گیری در میش‌های تمامی گروه‌ها 100 درصدی بود، در حالی‌که درصد بره‌زایی مشاهده شده در گروه‌های TC، 1T، 2 Tو 3 Tبه ترتیب 70، 80، 90 و 100 درصد بود. بالاترین وزن تولد در گروه 3T مشاهده شد (05/0P≤) که در گروه‌های 1T، 2 Tوگروه شاهد دنبال می‌شد. نتایج نشان دهنده بهبود قابل ملاحظه‌ای در وزن بدن میش‌ها، عملکرد میش در طی دوره آبستنی، نرخ بره‌زایی و وزن تولد بره‌ها به دلیل فلاشینگ تغذیه‌ای بود. نتایج، همچنین نشان داد که در میان چهار گروه تیماری، میش‌های گروه 3 Tبهبود معنی‌داری را در وزن بدن و راندمان تولید‌مثلی در نتیجه فلاشینگ در فصل جفت‌گیری نشان دادند. نتیجه این‌که تغذیه 500 گرم از کنسانتره بعلاوه چرای کافی، یک رژیم تغذیه‌ای مطلوب در مقایسه با سایر گروه‌های تیماری به منظور رسیدن به یک نمره وضعیت بدنی و راندمان تولید‌مثلی بالاتر است.

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